---
title: "Email Defense Blocked Attachments"
type: "knowledge"
post_id: "5633"
slug: "email-defense-blocked-attachments"
canonical: "https://kb.easydns.com/knowledge/email-defense-blocked-attachments/"
markdown_url: "https://kb.easydns.com/knowledge/email-defense-blocked-attachments.md"
json_url: "https://kb.easydns.com/knowledge/email-defense-blocked-attachments.json"
txt_url: "https://kb.easydns.com/knowledge/email-defense-blocked-attachments.txt"
published: "2025-03-06T22:12:03+00:00"
modified: "2025-12-02T17:20:17+00:00"
author: "Peter"
categories:
tags:
site_name: "easyDNS Knowledge Base"
publisher: "easyDNS Technologies Inc."
language: "en-US"
generator: "easyPress Markdown"
generator_version: "1.0.6"
---
easyMail’s EDS does standard filename and filetype content analysis to protect you from insecure attachments. Below are listed default blocked filenames and filetypes.

**Blocked file extensions**
---------------------------

.ade
.adp
.ani
.appcontent-ms
.appref-ms
.b64
.bat
.bhx
.cab
.cdxml
.ceo
.cer
.chm
.cmd
.cnf
.cnt
.com
.cpl
.cur
.der
.diagcab
.dll
.exe
.fdf
.grp
.hpj
.hqx
.hta
.img
.ins
.iqy
.iso
.isp
.its
.jar
.jnlp
.job
.jse?
.lha
.lib
.lnk
.lzh
.mad
.maf
.mag
.mam
.maq
.mar
.mas
.mat
.mau
.mav
.maw
.mcf
.mda
.mde
.mdz
.mhtml
.mim
.mobileconfig
.msc
.msi
.msp
.mst
.msu
.oft
.pif
.pl
.prf
.printerexport
.ps1
.ps1xml
.ps2
.ps2xml
.pscd1
.pscd2
.psdm1
.pssc
.pst
.py
.pyc
.pyo
.pyw
.pyz
.pyzw
.reg
.scf
.scr
.sct
.settingcontent-ms
.shb
.shs
.sys
.theme
.udl
.url
.uue
.vbe
.vbp
.vbs
.vhd
.vmdk
.vsmacros
.vss
.vst
.vsw
.vxd
.webpnp
.website
.ws
.wsb
.wsc
.wsf
.wsh
.xbap
.xll
.xnk
.xxe

**Blocked filetypes**
---------------------

self-extract
executable
ELF
Registry
Installer